A modern dental X-ray tube. The heated cathode is around the remaining. Centre would be the anode that is made from tungsten and embedded during the copper sleeve.William Coolidge points out healthcare imaging and X-rays. An X-ray tube is usually a vacuum tube that converts electrical input energy into X-rays.[1] https://tungsten-tubes98764.thenerdsblog.com/33888242/a-review-of-edgetech-industries-eti